(1) The Director shall cause every such copy of a secondary standard to be verified, and if found to be correct, to be authenticated, in the prescribed manner; and every copy so authenticated shall be a working standard for the purpose of this Act, and shall be so deemed until the contrary is proved, to be true and accurate.
(2) Every working standard in the custody of the Director, a Weights and Measures Inspector or any other agency to which custody has been assigned shall be verified once at least in every period of 2 years by comparison against a secondary standard of that unit of measurement.
(3) In the event of damage of a working standard, such standard shall not be used unless it has been compared with a secondary standard of that unit of measurement and found to be true and accurate, and authenticated by the Director in the prescribed manner.